* as.h (enum debug_info_type): Define.

	* as.h (enum debug_info_type): Define.
	(debug_type): Declare.
	* as.c (debug_type): New global variable.
	(show_usage): Add --gstabs.
	(parse_args): Handle --gstabs.
	* read.c (generate_asm_lineno): Remove.
	(read_a_source_file): Output stabs debugging if appropriate.
	Change checks of generate_asm_lineno to check debug_type.  Only
	generate ECOFF debugging if ECOFF_DEBUGGING is defined.
	* read.h (generate_asm_lineno): Don't declare.
	(stabs_generate_asm_lineno): Declare.
	* stabs.c (stabs_generate_asm_lineno): New function.
	* ecoff.c (add_file): Use debug_type, not generate_asm_lineno.
	Don't turn off debugging.
	(add_file): Remove old #if 0 code.
	(ecoff_new_file): Set debug_type, not generate_asm_lineno.
	(ecoff_directive_end): Don't generate stabs line symbols.
	(ecoff_generate_asm_lineno): Don't check stabs_seen.  Don't set
	generate_asm_lineno.
	(line_label_cnt): Remove.
	(ecoff_generate_asm_line_stab): Remove.
	* ecoff.h (ecoff_generate_asm_line_stab): Don't declare.
	* doc/as.texinfo, doc/as.1: Document --gstabs.